Spiked with energy and attitude, the nonfiction movie Fightville takes a fast look at a few men who, for pleasure and sometimes profit, like to smack and take down other men while practicing mixed martial arts.

By the end, Fightville feels authentic about this world, where success may be measured in wins, but the balance of unrelenting brutality and self-discipline needed for those wins is a trickier equation.

The language of ground-and-pound fighting remains untranslated for those not fluent in MMA, though ample space is given to the men's discussion of their individual warrior philosophies, illustrated with quotes from Nietzsche, P.T. Barnum, and Virgil.